Skip to main content

Simple and Free File Examination

I know many people that despise running multiple version of desktop antivirus. One of these programs us usually enough to drop performance to a crawl. For those careful people who like to validate suspect files you get there is a great service VirusTotal.

This service works by accepting uploaded files from users, then running them through a series of tests and virus scanning engines, currently 41 different ones to be exact. This makes it extremely useful for gauging how to treat that questionable email attachment. It manages to do this by making hashes of the files that get uploaded then instead of using additional CPU cycles by scanning duplicate files, just matches the hash then returns the information to the user.

The other really cool part is that it provides detailed file information as well by analyzing the file's actual structure. Someone sends you a .jpg - but really it contains windows executable code ready to infect your machine. Find out what PE information, file structure, and signatures exist within the file.

Best of all the service is free - and actually gets a much better set of core data the more people that use it!


Comments

Popular posts from this blog

Local Classified Penny Auction Scam

While there are a lot of new posts regarding the new ways to exploit people using novel techniques and 0day exploits, there continues to be a rash of tried and true methods of coercion.  I want to just walk through a simple example and reflect on how effective these methods continue to be. Many people turn toward online classified sites to buy and sell items online.  This example starts with kijiji.ca which even I've used on occasion to find used electronics and other items.  Doing a search on the site for a " Samsung Galaxy Note 2 " returns a posting from today with someone selling one for an unreasonably priced unit. $125 for a $500 phone?, but what if it's for real?  No harm in just asking some simple questions.  Email sent with some obvious questions regarding the condition and location. About an hour passes before I get a response from what appears to be a legit seller. Notice no answer to the questions I asked, but a friendly pointer at where th

Edmonton HeartBleed Information Session - April 16th, Royal Glenora Club

Since the latest major OpenSSL vulnerability was publicly disclosed, many people and organizations are scrambling to understand, respond and prepare themselves for the future.  Twitter, vendor support channels and media outlets have been quick to cover different angles of the issue but there has been overwhelming amount  of information released. With all this information, it can be difficult to understand what's relevant.  To help clarify we holding a special ISACA sponsored 2-hour session on Wednesday, April 16th, starting at 12:00pm at the Royal Glenora Club.   Benoit and I will be attempting to explain as much of the issue as we can from a technical and non-technical perspective, discussing the vulnerability, its scope with relation to our personal and professional lives and other related concerns such as our trust in the public PKI system.  The second hour we will be an interactive discussion about how others are dealing with problem, questions about related topics,

Touch ID - Distributed Fingerprint Lookup

All the press regarding the new Touch ID fingerprint biometric on Apple's new iPhone has brought some insight into how to misuse this service.  Most of the critics have focused on circumventing the device to gain access or Apple deciding to share the data with the Government. One interesting perspective that I haven't seen covered yet is if the system could be used as a distributed matching system for existing fingerprint image systems.  In an over simplified view of the process, a law enforcement agency can take an acquired fingerprint and search for patterns in the database of collected prints and spit out possible matches. Although Apple states that an API won't be available for apps, it is conceivable that such an interface might exist, and provide the ability to take an acquired print (either from the iPhone hardware or from software) and check it for validity against the stored print. There are some limits to this, as there is likely only going to be one prin